kernel/drivers/staging/rtl8192e/rtllib_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004, Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation. See README and COPYING for
  13  * more details.
  14  ******************************************************************************
  15
  16   Few modifications for Realtek's Wi-Fi drivers by
  17   Andrea Merello <andrea.merello@gmail.com>
  18
  19   A special thanks goes to Realtek for their support !
  20
  21 ******************************************************************************/
  22
  23
  24 #include <linux/compiler.h>
  25 #include <linux/errno.h>
  26 #include <linux/if_arp.h>
  27 #include <linux/in6.h>
  28 #include <linux/in.h>
  29 #include <linux/ip.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/pci.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/slab.h>
  37 #include <linux/tcp.h>
  38 #include <linux/types.h>
  39 #include <linux/wireless.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/ctype.h>
  43
  44 #include "rtllib.h"
  45 #include "dot11d.h"
  46
  47 static void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb,
  48                           struct rtllib_rx_stats *stats);
  49
  50 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
  51                                      struct sk_buff *skb,
  52                                      struct rtllib_rx_stats *rx_status,
  53                                      size_t hdr_length)
  54 {
  55         skb->dev = ieee->dev;
  56         skb_reset_mac_header(skb);
  57         skb_pull(skb, hdr_length);
  58         skb->pkt_type = PACKET_OTHERHOST;
  59         skb->protocol = htons(ETH_P_80211_RAW);
  60         memset(skb->cb, 0, sizeof(skb->cb));
  61         netif_rx(skb);
  62 }
  63
  64 /* Called only as a tasklet (software IRQ) */
  65 static struct rtllib_frag_entry *
  66 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
  67                           unsigned int frag, u8 tid, u8 *src, u8 *dst)
  68 {
  69         struct rtllib_frag_entry *entry;
  70         int i;
  71
  72         for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
  73                 entry = &ieee->frag_cache[tid][i];
  74                 if (entry->skb != NULL &&
  75                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  76                         netdev_dbg(ieee->dev,
  77                                    "expiring fragment cache entry seq=%u last_frag=%u\n",
  78                                    entry->seq, entry->last_frag);
  79                         dev_kfree_skb_any(entry->skb);
  80                         entry->skb = NULL;
  81                 }
  82
  83                 if (entry->skb != NULL && entry->seq == seq &&
  84                     (entry->last_frag + 1 == frag || frag == -1) &&
  85                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  86                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  87                         return entry;
  88         }
  89
  90         return NULL;
  91 }
  92
  93 /* Called only as a tasklet (software IRQ) */
  94 static struct sk_buff *
  95 rtllib_frag_cache_get(struct rtllib_device *ieee,
  96                          struct rtllib_hdr_4addr *hdr)
  97 {
  98         struct sk_buff *skb = NULL;
  99         u16 fc = le16_to_cpu(hdr->frame_ctl);
 100         u16 sc = le16_to_cpu(hdr->seq_ctl);
 101         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
 102         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 103         struct rtllib_frag_entry *entry;
 104         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 105         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 106         u8 tid;
 107
 108         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
 109             RTLLIB_QOS_HAS_SEQ(fc)) {
 110                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 111                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 112                 tid = UP2AC(tid);
 113                 tid++;
 114         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 115                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 116                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 117                 tid = UP2AC(tid);
 118                 tid++;
 119         } else {
 120                 tid = 0;
 121         }
 122
 123         if (frag == 0) {
 124                 /* Reserve enough space to fit maximum frame length */
 125                 skb = dev_alloc_skb(ieee->dev->mtu +
 126                                     sizeof(struct rtllib_hdr_4addr) +
 127                                     8 /* LLC */ +
 128                                     2 /* alignment */ +
 129                                     8 /* WEP */ +
 130                                     ETH_ALEN /* WDS */ +
 131                                     /* QOS Control */
 132                                     (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0));
 133                 if (skb == NULL)
 134                         return NULL;
 135
 136                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 137                 ieee->frag_next_idx[tid]++;
 138                 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
 139                         ieee->frag_next_idx[tid] = 0;
 140
 141                 if (entry->skb != NULL)
 142                         dev_kfree_skb_any(entry->skb);
 143
 144                 entry->first_frag_time = jiffies;
 145                 entry->seq = seq;
 146                 entry->last_frag = frag;
 147                 entry->skb = skb;
 148                 ether_addr_copy(entry->src_addr, hdr->addr2);
 149                 ether_addr_copy(entry->dst_addr, hdr->addr1);
 150         } else {
 151                 /* received a fragment of a frame for which the head fragment
 152                  * should have already been received
 153                  */
 154                 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
 155                                                   hdr->addr1);
 156                 if (entry != NULL) {
 157                         entry->last_frag = frag;
 158                         skb = entry->skb;
 159                 }
 160         }
 161
 162         return skb;
 163 }
 164
 165
 166 /* Called only as a tasklet (software IRQ) */
 167 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
 168                                            struct rtllib_hdr_4addr *hdr)
 169 {
 170         u16 fc = le16_to_cpu(hdr->frame_ctl);
 171         u16 sc = le16_to_cpu(hdr->seq_ctl);
 172         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 173         struct rtllib_frag_entry *entry;
 174         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 175         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 176         u8 tid;
 177
 178         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
 179             RTLLIB_QOS_HAS_SEQ(fc)) {
 180                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 181                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 182                 tid = UP2AC(tid);
 183                 tid++;
 184         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 185                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 186                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 187                 tid = UP2AC(tid);
 188                 tid++;
 189         } else {
 190                 tid = 0;
 191         }
 192
 193         entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
 194                                           hdr->addr1);
 195
 196         if (entry == NULL) {
 197                 netdev_dbg(ieee->dev,
 198                            "Couldn't invalidate fragment cache entry (seq=%u)\n",
 199                            seq);
 200                 return -1;
 201         }
 202
 203         entry->skb = NULL;
 204         return 0;
 205 }
 206
 207 /* rtllib_rx_frame_mgtmt
 208  *
 209  * Responsible for handling management control frames
 210  *
 211  * Called by rtllib_rx
 212  */
 213 static inline int
 214 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
 215                         struct rtllib_rx_stats *rx_stats, u16 type,
 216                         u16 stype)
 217 {
 218         /* On the struct stats definition there is written that
 219          * this is not mandatory.... but seems that the probe
 220          * response parser uses it
 221          */
 222         struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
 223
 224         rx_stats->len = skb->len;
 225         rtllib_rx_mgt(ieee, skb, rx_stats);
 226         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
 227                 dev_kfree_skb_any(skb);
 228                 return 0;
 229         }
 230         rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 231
 232         dev_kfree_skb_any(skb);
 233
 234         return 0;
 235 }
 236
 237 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation
 238  * Ethernet-II snap header (RFC1042 for most EtherTypes)
 239  */
 240 static unsigned char rfc1042_header[] = {
 241         0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
 242 };
 243 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 244 static unsigned char bridge_tunnel_header[] = {
 245         0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
 246 };
 247 /* No encapsulation header if EtherType < 0x600 (=length) */
 248
 249 /* Called by rtllib_rx_frame_decrypt */
 250 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
 251                                     struct sk_buff *skb, size_t hdrlen)
 252 {
 253         struct net_device *dev = ieee->dev;
 254         u16 fc, ethertype;
 255         struct rtllib_hdr_4addr *hdr;
 256         u8 *pos;
 257
 258         if (skb->len < 24)
 259                 return 0;
 260
 261         hdr = (struct rtllib_hdr_4addr *) skb->data;
 262         fc = le16_to_cpu(hdr->frame_ctl);
 263
 264         /* check that the frame is unicast frame to us */
 265         if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 266             RTLLIB_FCTL_TODS &&
 267             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 268             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 269                 /* ToDS frame with own addr BSSID and DA */
 270         } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 271                    RTLLIB_FCTL_FROMDS &&
 272                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 273                 /* FromDS frame with own addr as DA */
 274         } else
 275                 return 0;
 276
 277         if (skb->len < 24 + 8)
 278                 return 0;
 279
 280         /* check for port access entity Ethernet type */
 281         pos = skb->data + hdrlen;
 282         ethertype = (pos[6] << 8) | pos[7];
 283         if (ethertype == ETH_P_PAE)
 284                 return 1;
 285
 286         return 0;
 287 }
 288
 289 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 290 static inline int
 291 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
 292                         struct lib80211_crypt_data *crypt)
 293 {
 294         struct rtllib_hdr_4addr *hdr;
 295         int res, hdrlen;
 296
 297         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 298                 return 0;
 299
 300         if (ieee->hwsec_active) {
 301                 struct cb_desc *tcb_desc = (struct cb_desc *)
 302                                                 (skb->cb + MAX_DEV_ADDR_SIZE);
 303
 304                 tcb_desc->bHwSec = 1;
 305
 306                 if (ieee->need_sw_enc)
 307                         tcb_desc->bHwSec = 0;
 308         }
 309
 310         hdr = (struct rtllib_hdr_4addr *) skb->data;
 311         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 312
 313         atomic_inc(&crypt->refcnt);
 314         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 315         atomic_dec(&crypt->refcnt);
 316         if (res < 0) {
 317                 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n",
 318                            hdr->addr2, res);
 319                 if (res == -2)
 320                         netdev_dbg(ieee->dev,
 321                                    "Decryption failed ICV mismatch (key %d)\n",
 322                                    skb->data[hdrlen + 3] >> 6);
 323                 return -1;
 324         }
 325
 326         return res;
 327 }
 328
 329
 330 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 331 static inline int
 332 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
 333                              int keyidx, struct lib80211_crypt_data *crypt)
 334 {
 335         struct rtllib_hdr_4addr *hdr;
 336         int res, hdrlen;
 337
 338         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 339                 return 0;
 340         if (ieee->hwsec_active) {
 341                 struct cb_desc *tcb_desc = (struct cb_desc *)
 342                                                 (skb->cb + MAX_DEV_ADDR_SIZE);
 343
 344                 tcb_desc->bHwSec = 1;
 345
 346                 if (ieee->need_sw_enc)
 347                         tcb_desc->bHwSec = 0;
 348         }
 349
 350         hdr = (struct rtllib_hdr_4addr *) skb->data;
 351         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 352
 353         atomic_inc(&crypt->refcnt);
 354         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 355         atomic_dec(&crypt->refcnt);
 356         if (res < 0) {
 357                 netdev_dbg(ieee->dev,
 358                            "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
 359                            hdr->addr2, keyidx);
 360                 return -1;
 361         }
 362
 363         return 0;
 364 }
 365
 366
 367 /* this function is stolen from ipw2200 driver*/
 368 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 369 static int is_duplicate_packet(struct rtllib_device *ieee,
 370                                       struct rtllib_hdr_4addr *header)
 371 {
 372         u16 fc = le16_to_cpu(header->frame_ctl);
 373         u16 sc = le16_to_cpu(header->seq_ctl);
 374         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 375         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 376         u16 *last_seq, *last_frag;
 377         unsigned long *last_time;
 378         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 379         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 380         u8 tid;
 381
 382         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
 383             RTLLIB_QOS_HAS_SEQ(fc)) {
 384                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
 385                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 386                 tid = UP2AC(tid);
 387                 tid++;
 388         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 389                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
 390                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 391                 tid = UP2AC(tid);
 392                 tid++;
 393         } else {
 394                 tid = 0;
 395         }
 396
 397         switch (ieee->iw_mode) {
 398         case IW_MODE_ADHOC:
 399         {
 400                 struct list_head *p;
 401                 struct ieee_ibss_seq *entry = NULL;
 402                 u8 *mac = header->addr2;
 403                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 404
 405                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 406                         entry = list_entry(p, struct ieee_ibss_seq, list);
 407                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 408                                 break;
 409                 }
 410                 if (p == &ieee->ibss_mac_hash[index]) {
 411                         entry = kmalloc(sizeof(struct ieee_ibss_seq),
 412                                         GFP_ATOMIC);
 413                         if (!entry)
 414                                 return 0;
 415
 416                         ether_addr_copy(entry->mac, mac);
 417                         entry->seq_num[tid] = seq;
 418                         entry->frag_num[tid] = frag;
 419                         entry->packet_time[tid] = jiffies;
 420                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 421                         return 0;
 422                 }
 423                 last_seq = &entry->seq_num[tid];
 424                 last_frag = &entry->frag_num[tid];
 425                 last_time = &entry->packet_time[tid];
 426                 break;
 427         }
 428
 429         case IW_MODE_INFRA:
 430                 last_seq = &ieee->last_rxseq_num[tid];
 431                 last_frag = &ieee->last_rxfrag_num[tid];
 432                 last_time = &ieee->last_packet_time[tid];
 433                 break;
 434         default:
 435                 return 0;
 436         }
 437
 438         if ((*last_seq == seq) &&
 439             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 440                 if (*last_frag == frag)
 441                         goto drop;
 442                 if (*last_frag + 1 != frag)
 443                         /* out-of-order fragment */
 444                         goto drop;
 445         } else
 446                 *last_seq = seq;
 447
 448         *last_frag = frag;
 449         *last_time = jiffies;
 450         return 0;
 451
 452 drop:
 453
 454         return 1;
 455 }
 456
 457 static bool AddReorderEntry(struct rx_ts_record *pTS,
 458                             struct rx_reorder_entry *pReorderEntry)
 459 {
 460         struct list_head *pList = &pTS->RxPendingPktList;
 461
 462         while (pList->next != &pTS->RxPendingPktList) {
 463                 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
 464                     list_entry(pList->next, struct rx_reorder_entry,
 465                     List))->SeqNum))
 466                         pList = pList->next;
 467                 else if (SN_EQUAL(pReorderEntry->SeqNum,
 468                         ((struct rx_reorder_entry *)list_entry(pList->next,
 469                         struct rx_reorder_entry, List))->SeqNum))
 470                                 return false;
 471                 else
 472                         break;
 473         }
 474         pReorderEntry->List.next = pList->next;
 475         pReorderEntry->List.next->prev = &pReorderEntry->List;
 476         pReorderEntry->List.prev = pList;
 477         pList->next = &pReorderEntry->List;
 478
 479         return true;
 480 }
 481
 482 void rtllib_indicate_packets(struct rtllib_device *ieee,
 483                              struct rtllib_rxb **prxbIndicateArray, u8 index)
 484 {
 485         struct net_device_stats *stats = &ieee->stats;
 486         u8 i = 0, j = 0;
 487         u16 ethertype;
 488
 489         for (j = 0; j < index; j++) {
 490                 struct rtllib_rxb *prxb = prxbIndicateArray[j];
 491
 492                 for (i = 0; i < prxb->nr_subframes; i++) {
 493                         struct sk_buff *sub_skb = prxb->subframes[i];
 494
 495                 /* convert hdr + possible LLC headers into Ethernet header */
 496                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 497                         if (sub_skb->len >= 8 &&
 498                             ((memcmp(sub_skb->data, rfc1042_header,
 499                                      SNAP_SIZE) == 0 &&
 500                               ethertype != ETH_P_AARP &&
 501                               ethertype != ETH_P_IPX) ||
 502                             memcmp(sub_skb->data, bridge_tunnel_header,
 503                                    SNAP_SIZE) == 0)) {
 504                                 /* remove RFC1042 or Bridge-Tunnel encapsulation
 505                                  * and replace EtherType
 506                                  */
 507                                 skb_pull(sub_skb, SNAP_SIZE);
 508                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 509                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 510                         } else {
 511                                 u16 len;
 512                         /* Leave Ethernet header part of hdr and full payload */
 513                                 len = sub_skb->len;
 514                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 515                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 516                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 517                         }
 518
 519                         /* Indicate the packets to upper layer */
 520                         if (sub_skb) {
 521                                 stats->rx_packets++;
 522                                 stats->rx_bytes += sub_skb->len;
 523
 524                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 525                                 sub_skb->protocol = eth_type_trans(sub_skb,
 526                                                                    ieee->dev);
 527                                 sub_skb->dev = ieee->dev;
 528                                 sub_skb->dev->stats.rx_packets++;
 529                                 sub_skb->dev->stats.rx_bytes += sub_skb->len;
 530                                 /* 802.11 crc not sufficient */
 531                                 sub_skb->ip_summed = CHECKSUM_NONE;
 532                                 ieee->last_rx_ps_time = jiffies;
 533                                 netif_rx(sub_skb);
 534                         }
 535                 }
 536                 kfree(prxb);
 537                 prxb = NULL;
 538         }
 539 }
 540
 541 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,
 542                                  struct rx_ts_record *pTS)
 543 {
 544         struct rx_reorder_entry *pRxReorderEntry;
 545         u8 RfdCnt = 0;
 546
 547         del_timer_sync(&pTS->RxPktPendingTimer);
 548         while (!list_empty(&pTS->RxPendingPktList)) {
 549                 if (RfdCnt >= REORDER_WIN_SIZE) {
 550                         netdev_info(ieee->dev,
 551                                     "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
 552                                     __func__);
 553                         break;
 554                 }
 555
 556                 pRxReorderEntry = (struct rx_reorder_entry *)
 557                                   list_entry(pTS->RxPendingPktList.prev,
 558                                              struct rx_reorder_entry, List);
 559                 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__,
 560                            pRxReorderEntry->SeqNum);
 561                 list_del_init(&pRxReorderEntry->List);
 562
 563                 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
 564
 565                 RfdCnt = RfdCnt + 1;
 566                 list_add_tail(&pRxReorderEntry->List,
 567                               &ieee->RxReorder_Unused_List);
 568         }
 569         rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
 570
 571         pTS->RxIndicateSeq = 0xffff;
 572 }
 573
 574 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
 575                                     struct rtllib_rxb *prxb,
 576                                     struct rx_ts_record *pTS, u16 SeqNum)
 577 {
 578         struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
 579         struct rx_reorder_entry *pReorderEntry = NULL;
 580         u8 WinSize = pHTInfo->RxReorderWinSize;
 581         u16 WinEnd = 0;
 582         u8 index = 0;
 583         bool bMatchWinStart = false, bPktInBuf = false;
 584         unsigned long flags;
 585
 586         netdev_dbg(ieee->dev,
 587                    "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n",
 588                    __func__, SeqNum, pTS->RxIndicateSeq, WinSize);
 589
 590         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
 591
 592         WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
 593         /* Rx Reorder initialize condition.*/
 594         if (pTS->RxIndicateSeq == 0xffff)
 595                 pTS->RxIndicateSeq = SeqNum;
 596
 597         /* Drop out the packet which SeqNum is smaller than WinStart */
 598         if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 599                 netdev_dbg(ieee->dev,
 600                            "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 601                            pTS->RxIndicateSeq, SeqNum);
 602                 pHTInfo->RxReorderDropCounter++;
 603                 {
 604                         int i;
 605
 606                         for (i = 0; i < prxb->nr_subframes; i++)
 607                                 dev_kfree_skb(prxb->subframes[i]);
 608                         kfree(prxb);
 609                         prxb = NULL;
 610                 }
 611                 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 612                 return;
 613         }
 614
 615         /* Sliding window manipulation. Conditions includes:
 616          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 617          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 618          */
 619         if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 620                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 621                 bMatchWinStart = true;
 622         } else if (SN_LESS(WinEnd, SeqNum)) {
 623                 if (SeqNum >= (WinSize - 1))
 624                         pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
 625                 else
 626                         pTS->RxIndicateSeq = 4095 -
 627                                              (WinSize - (SeqNum + 1)) + 1;
 628                 netdev_dbg(ieee->dev,
 629                            "Window Shift! IndicateSeq: %d, NewSeq: %d\n",
 630                            pTS->RxIndicateSeq, SeqNum);
 631         }
 632
 633         /* Indication process.
 634          * After Packet dropping and Sliding Window shifting as above, we can
 635          * now just indicate the packets with the SeqNum smaller than latest
 636          * WinStart and struct buffer other packets.
 637          *
 638          * For Rx Reorder condition:
 639          * 1. All packets with SeqNum smaller than WinStart => Indicate
 640          * 2. All packets with SeqNum larger than or equal to
 641          *       WinStart => Buffer it.
 642          */
 643         if (bMatchWinStart) {
 644                 /* Current packet is going to be indicated.*/
 645                 netdev_dbg(ieee->dev,
 646                            "Packets indication! IndicateSeq: %d, NewSeq: %d\n",
 647                            pTS->RxIndicateSeq, SeqNum);
 648                 ieee->prxbIndicateArray[0] = prxb;
 649                 index = 1;
 650         } else {
 651                 /* Current packet is going to be inserted into pending list.*/
 652                 if (!list_empty(&ieee->RxReorder_Unused_List)) {
 653                         pReorderEntry = (struct rx_reorder_entry *)
 654                                         list_entry(ieee->RxReorder_Unused_List.next,
 655                                         struct rx_reorder_entry, List);
 656                         list_del_init(&pReorderEntry->List);
 657
 658                         /* Make a reorder entry and insert
 659                          * into a the packet list.
 660                          */
 661                         pReorderEntry->SeqNum = SeqNum;
 662                         pReorderEntry->prxb = prxb;
 663
 664                         if (!AddReorderEntry(pTS, pReorderEntry)) {
 665                                 int i;
 666
 667                                 netdev_dbg(ieee->dev,
 668                                            "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n",
 669                                            __func__, pTS->RxIndicateSeq,
 670                                            SeqNum);
 671                                 list_add_tail(&pReorderEntry->List,
 672                                               &ieee->RxReorder_Unused_List);
 673
 674                                 for (i = 0; i < prxb->nr_subframes; i++)
 675                                         dev_kfree_skb(prxb->subframes[i]);
 676                                 kfree(prxb);
 677                                 prxb = NULL;
 678                         } else {
 679                                 netdev_dbg(ieee->dev,
 680                                            "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n",
 681                                            pTS->RxIndicateSeq, SeqNum);
 682                         }
 683                 } else {
 684                         /* Packets are dropped if there are not enough reorder
 685                          * entries. This part should be modified!! We can just
 686                          * indicate all the packets in struct buffer and get
 687                          * reorder entries.
 688                          */
 689                         netdev_err(ieee->dev,
 690                                    "%s(): There is no reorder entry! Packet is dropped!\n",
 691                                    __func__);
 692                         {
 693                                 int i;
 694
 695                                 for (i = 0; i < prxb->nr_subframes; i++)
 696                                         dev_kfree_skb(prxb->subframes[i]);
 697                                 kfree(prxb);
 698                                 prxb = NULL;
 699                         }
 700                 }
 701         }
 702
 703         /* Check if there is any packet need indicate.*/
 704         while (!list_empty(&pTS->RxPendingPktList)) {
 705                 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n",
 706                            __func__);
 707
 708                 pReorderEntry = (struct rx_reorder_entry *)
 709                                         list_entry(pTS->RxPendingPktList.prev,
 710                                                    struct rx_reorder_entry,
 711                                                    List);
 712                 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 713                     SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
 714                         /* This protect struct buffer from overflow. */
 715                         if (index >= REORDER_WIN_SIZE) {
 716                                 netdev_err(ieee->dev,
 717                                            "%s(): Buffer overflow!\n",
 718                                            __func__);
 719                                 bPktInBuf = true;
 720                                 break;
 721                         }
 722
 723                         list_del_init(&pReorderEntry->List);
 724
 725                         if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 726                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) %
 727                                                      4096;
 728
 729                         ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
 730                         netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n",
 731                                    __func__, pReorderEntry->SeqNum);
 732                         index++;
 733
 734                         list_add_tail(&pReorderEntry->List,
 735                                       &ieee->RxReorder_Unused_List);
 736                 } else {
 737                         bPktInBuf = true;
 738                         break;
 739                 }
 740         }
 741
 742         /* Handling pending timer. Set this timer to prevent from long time
 743          * Rx buffering.
 744          */
 745         if (index > 0) {
 746                 if (timer_pending(&pTS->RxPktPendingTimer))
 747                         del_timer_sync(&pTS->RxPktPendingTimer);
 748                 pTS->RxTimeoutIndicateSeq = 0xffff;
 749
 750                 if (index > REORDER_WIN_SIZE) {
 751                         netdev_err(ieee->dev,
 752                                    "%s(): Rx Reorder struct buffer full!\n",
 753                                    __func__);
 754                         spin_unlock_irqrestore(&(ieee->reorder_spinlock),
 755                                                flags);
 756                         return;
 757                 }
 758                 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
 759                 bPktInBuf = false;
 760         }
 761
 762         if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
 763                 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__);
 764                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 765                 mod_timer(&pTS->RxPktPendingTimer, jiffies +
 766                           msecs_to_jiffies(pHTInfo->RxReorderPendingTime));
 767         }
 768         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 769 }
 770
 771 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
 772                          struct rtllib_rx_stats *rx_stats,
 773                          struct rtllib_rxb *rxb, u8 *src, u8 *dst)
 774 {
 775         struct rtllib_hdr_3addr  *hdr = (struct rtllib_hdr_3addr *)skb->data;
 776         u16             fc = le16_to_cpu(hdr->frame_ctl);
 777
 778         u16             LLCOffset = sizeof(struct rtllib_hdr_3addr);
 779         u16             ChkLength;
 780         bool            bIsAggregateFrame = false;
 781         u16             nSubframe_Length;
 782         u8              nPadding_Length = 0;
 783         u16             SeqNum = 0;
 784         struct sk_buff *sub_skb;
 785         u8           *data_ptr;
 786         /* just for debug purpose */
 787         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 788         if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
 789            (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
 790                 bIsAggregateFrame = true;
 791
 792         if (RTLLIB_QOS_HAS_SEQ(fc))
 793                 LLCOffset += 2;
 794         if (rx_stats->bContainHTC)
 795                 LLCOffset += sHTCLng;
 796
 797         ChkLength = LLCOffset;
 798
 799         if (skb->len <= ChkLength)
 800                 return 0;
 801
 802         skb_pull(skb, LLCOffset);
 803         ieee->bIsAggregateFrame = bIsAggregateFrame;
 804         if (!bIsAggregateFrame) {
 805                 rxb->nr_subframes = 1;
 806
 807                 /* altered by clark 3/30/2010
 808                  * The struct buffer size of the skb indicated to upper layer
 809                  * must be less than 5000, or the defraged IP datagram
 810                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 811                  * discarded. so there must not use the function
 812                  * "skb_copy" and "skb_clone" for "skb".
 813                  */
 814
 815                 /* Allocate new skb for releasing to upper layer */
 816                 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
 817                 if (!sub_skb)
 818                         return 0;
 819                 skb_reserve(sub_skb, 12);
 820                 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
 821                 memcpy(data_ptr, skb->data, skb->len);
 822                 sub_skb->dev = ieee->dev;
 823
 824                 rxb->subframes[0] = sub_skb;
 825
 826                 memcpy(rxb->src, src, ETH_ALEN);
 827                 memcpy(rxb->dst, dst, ETH_ALEN);
 828                 rxb->subframes[0]->dev = ieee->dev;
 829                 return 1;
 830         }
 831
 832         rxb->nr_subframes = 0;
 833         memcpy(rxb->src, src, ETH_ALEN);
 834         memcpy(rxb->dst, dst, ETH_ALEN);
 835         while (skb->len > ETHERNET_HEADER_SIZE) {
 836                 /* Offset 12 denote 2 mac address */
 837                 nSubframe_Length = *((u16 *)(skb->data + 12));
 838                 nSubframe_Length = (nSubframe_Length >> 8) +
 839                                    (nSubframe_Length << 8);
 840
 841                 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 842                         netdev_info(ieee->dev,
 843                                     "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
 844                                     __func__, rxb->nr_subframes);
 845                         netdev_info(ieee->dev,
 846                                     "%s: A-MSDU parse error!! Subframe Length: %d\n",
 847                                     __func__, nSubframe_Length);
 848                         netdev_info(ieee->dev,
 849                                     "nRemain_Length is %d and nSubframe_Length is : %d\n",
 850                                     skb->len, nSubframe_Length);
 851                         netdev_info(ieee->dev,
 852                                     "The Packet SeqNum is %d\n",
 853                                     SeqNum);
 854                         return 0;
 855                 }
 856
 857                 /* move the data point to data content */
 858                 skb_pull(skb, ETHERNET_HEADER_SIZE);
 859
 860                 /* altered by clark 3/30/2010
 861                  * The struct buffer size of the skb indicated to upper layer
 862                  * must be less than 5000, or the defraged IP datagram
 863                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 864                  * discarded. so there must not use the function
 865                  * "skb_copy" and "skb_clone" for "skb".
 866                  */
 867
 868                 /* Allocate new skb for releasing to upper layer */
 869                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 870                 if (!sub_skb)
 871                         return 0;
 872                 skb_reserve(sub_skb, 12);
 873                 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 874                 memcpy(data_ptr, skb->data, nSubframe_Length);
 875
 876                 sub_skb->dev = ieee->dev;
 877                 rxb->subframes[rxb->nr_subframes++] = sub_skb;
 878                 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 879                         netdev_dbg(ieee->dev,
 880                                    "ParseSubframe(): Too many Subframes! Packets dropped!\n");
 881                         break;
 882                 }
 883                 skb_pull(skb, nSubframe_Length);
 884
 885                 if (skb->len != 0) {
 886                         nPadding_Length = 4 - ((nSubframe_Length +
 887                                           ETHERNET_HEADER_SIZE) % 4);
 888                         if (nPadding_Length == 4)
 889                                 nPadding_Length = 0;
 890
 891                         if (skb->len < nPadding_Length)
 892                                 return 0;
 893
 894                         skb_pull(skb, nPadding_Length);
 895                 }
 896         }
 897
 898         return rxb->nr_subframes;
 899 }
 900
 901
 902 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
 903                                    struct sk_buff *skb,
 904                                    struct rtllib_rx_stats *rx_stats)
 905 {
 906         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 907         u16 fc = le16_to_cpu(hdr->frame_ctl);
 908         size_t hdrlen = 0;
 909
 910         hdrlen = rtllib_get_hdrlen(fc);
 911         if (HTCCheck(ieee, skb->data)) {
 912                 if (net_ratelimit())
 913                         netdev_info(ieee->dev, "%s: find HTCControl!\n",
 914                                     __func__);
 915                 hdrlen += 4;
 916                 rx_stats->bContainHTC = true;
 917         }
 918
 919          if (RTLLIB_QOS_HAS_SEQ(fc))
 920                 rx_stats->bIsQosData = true;
 921
 922         return hdrlen;
 923 }
 924
 925 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
 926                                      struct sk_buff *skb, u8 multicast)
 927 {
 928         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 929         u16 fc, sc;
 930         u8 frag, type, stype;
 931
 932         fc = le16_to_cpu(hdr->frame_ctl);
 933         type = WLAN_FC_GET_TYPE(fc);
 934         stype = WLAN_FC_GET_STYPE(fc);
 935         sc = le16_to_cpu(hdr->seq_ctl);
 936         frag = WLAN_GET_SEQ_FRAG(sc);
 937
 938         if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
 939                 !ieee->current_network.qos_data.active ||
 940                 !IsDataFrame(skb->data) ||
 941                 IsLegacyDataFrame(skb->data)) {
 942                 if (!((type == RTLLIB_FTYPE_MGMT) &&
 943                       (stype == RTLLIB_STYPE_BEACON))) {
 944                         if (is_duplicate_packet(ieee, hdr))
 945                                 return -1;
 946                 }
 947         } else {
 948                 struct rx_ts_record *pRxTS = NULL;
 949
 950                 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
 951                         (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
 952                         if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
 953                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
 954                                 return -1;
 955                         pRxTS->RxLastFragNum = frag;
 956                         pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
 957                 } else {
 958                         netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n",
 959                                     __func__);
 960                         return -1;
 961                 }
 962         }
 963
 964         return 0;
 965 }
 966
 967 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
 968                                    struct rtllib_hdr_4addr *hdr, u8 *dst,
 969                                    u8 *src, u8 *bssid)
 970 {
 971         u16 fc = le16_to_cpu(hdr->frame_ctl);
 972
 973         switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
 974         case RTLLIB_FCTL_FROMDS:
 975                 ether_addr_copy(dst, hdr->addr1);
 976                 ether_addr_copy(src, hdr->addr3);
 977                 ether_addr_copy(bssid, hdr->addr2);
 978                 break;
 979         case RTLLIB_FCTL_TODS:
 980                 ether_addr_copy(dst, hdr->addr3);
 981                 ether_addr_copy(src, hdr->addr2);
 982                 ether_addr_copy(bssid, hdr->addr1);
 983                 break;
 984         case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
 985                 ether_addr_copy(dst, hdr->addr3);
 986                 ether_addr_copy(src, hdr->addr4);
 987                 ether_addr_copy(bssid, ieee->current_network.bssid);
 988                 break;
 989         case 0:
 990                 ether_addr_copy(dst, hdr->addr1);
 991                 ether_addr_copy(src, hdr->addr2);
 992                 ether_addr_copy(bssid, hdr->addr3);
 993                 break;
 994         }
 995 }
 996
 997 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
 998                                  u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
 999 {
1000         u8 type, stype;
1001
1002         type = WLAN_FC_GET_TYPE(fc);
1003         stype = WLAN_FC_GET_STYPE(fc);
1004
1005         /* Filter frames from different BSS */
1006         if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
1007             !ether_addr_equal(ieee->current_network.bssid, bssid) &&
1008             !is_zero_ether_addr(ieee->current_network.bssid)) {
1009                 return -1;
1010         }
1011
1012         /* Filter packets sent by an STA that will be forwarded by AP */
1013         if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn  &&
1014                 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
1015                 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
1016                     !ether_addr_equal(dst, ieee->current_network.bssid) &&
1017                     ether_addr_equal(bssid, ieee->current_network.bssid)) {
1018                         return -1;
1019                 }
1020         }
1021
1022         /* Nullfunc frames may have PS-bit set, so they must be passed to
1023          * hostap_handle_sta_rx() before being dropped here.
1024          */
1025         if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
1026                 if (stype != RTLLIB_STYPE_DATA &&
1027                     stype != RTLLIB_STYPE_DATA_CFACK &&
1028                     stype != RTLLIB_STYPE_DATA_CFPOLL &&
1029                     stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
1030                     stype != RTLLIB_STYPE_QOS_DATA) {
1031                         if (stype != RTLLIB_STYPE_NULLFUNC)
1032                                 netdev_dbg(ieee->dev,
1033                                            "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
1034                                            type, stype);
1035                         return -1;
1036                 }
1037         }
1038
1039         if (ieee->iw_mode != IW_MODE_MESH) {
1040                 /* packets from our adapter are dropped (echo) */
1041                 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1042                         return -1;
1043
1044                 /* {broad,multi}cast packets to our BSS go through */
1045                 if (is_multicast_ether_addr(dst)) {
1046                         if (memcmp(bssid, ieee->current_network.bssid,
1047                                    ETH_ALEN))
1048                                 return -1;
1049                 }
1050         }
1051         return 0;
1052 }
1053
1054 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1055                         struct lib80211_crypt_data **crypt, size_t hdrlen)
1056 {
1057         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1058         u16 fc = le16_to_cpu(hdr->frame_ctl);
1059         int idx = 0;
1060
1061         if (ieee->host_decrypt) {
1062                 if (skb->len >= hdrlen + 3)
1063                         idx = skb->data[hdrlen + 3] >> 6;
1064
1065                 *crypt = ieee->crypt_info.crypt[idx];
1066                 /* allow NULL decrypt to indicate an station specific override
1067                  * for default encryption
1068                  */
1069                 if (*crypt && ((*crypt)->ops == NULL ||
1070                               (*crypt)->ops->decrypt_mpdu == NULL))
1071                         *crypt = NULL;
1072
1073                 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1074                         /* This seems to be triggered by some (multicast?)
1075                          * frames from other than current BSS, so just drop the
1076                          * frames silently instead of filling system log with
1077                          * these reports.
1078                          */
1079                         netdev_dbg(ieee->dev,
1080                                    "Decryption failed (not set) (SA= %pM)\n",
1081                                    hdr->addr2);
1082                         return -1;
1083                 }
1084         }
1085
1086         return 0;
1087 }
1088
1089 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1090                       struct rtllib_rx_stats *rx_stats,
1091                       struct lib80211_crypt_data *crypt, size_t hdrlen)
1092 {
1093         struct rtllib_hdr_4addr *hdr;
1094         int keyidx = 0;
1095         u16 fc, sc;
1096         u8 frag;
1097
1098         hdr = (struct rtllib_hdr_4addr *)skb->data;
1099         fc = le16_to_cpu(hdr->frame_ctl);
1100         sc = le16_to_cpu(hdr->seq_ctl);
1101         frag = WLAN_GET_SEQ_FRAG(sc);
1102
1103         if ((!rx_stats->Decrypted))
1104                 ieee->need_sw_enc = 1;
1105         else
1106                 ieee->need_sw_enc = 0;
1107
1108         keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1109         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1110                 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
1111                 return -1;
1112         }
1113
1114         hdr = (struct rtllib_hdr_4addr *) skb->data;
1115         if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1116                 int flen;
1117                 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1118
1119                 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag);
1120
1121                 if (!frag_skb) {
1122                         netdev_dbg(ieee->dev,
1123                                    "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1124                                    (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1125                                    WLAN_GET_SEQ_SEQ(sc), frag);
1126                         return -1;
1127                 }
1128                 flen = skb->len;
1129                 if (frag != 0)
1130                         flen -= hdrlen;
1131
1132                 if (frag_skb->tail + flen > frag_skb->end) {
1133                         netdev_warn(ieee->dev,
1134                                     "%s: host decrypted and reassembled frame did not fit skb\n",
1135                                     __func__);
1136                         rtllib_frag_cache_invalidate(ieee, hdr);
1137                         return -1;
1138                 }
1139
1140                 if (frag == 0) {
1141                         /* copy first fragment (including full headers) into
1142                          * beginning of the fragment cache skb
1143                          */
1144                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1145                 } else {
1146                         /* append frame payload to the end of the fragment
1147                          * cache skb
1148                          */
1149                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1150                                flen);
1151                 }
1152                 dev_kfree_skb_any(skb);
1153                 skb = NULL;
1154
1155                 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1156                         /* more fragments expected - leave the skb in fragment
1157                          * cache for now; it will be delivered to upper layers
1158                          * after all fragments have been received
1159                          */
1160                         return -2;
1161                 }
1162
1163                 /* this was the last fragment and the frame will be
1164                  * delivered, so remove skb from fragment cache
1165                  */
1166                 skb = frag_skb;
1167                 hdr = (struct rtllib_hdr_4addr *) skb->data;
1168                 rtllib_frag_cache_invalidate(ieee, hdr);
1169         }
1170
1171         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1172          * encrypted/authenticated
1173          */
1174         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1175                 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1176                 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
1177                 return -1;
1178         }
1179
1180         hdr = (struct rtllib_hdr_4addr *) skb->data;
1181         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1182                 if (/*ieee->ieee802_1x &&*/
1183                     rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1184
1185                         /* pass unencrypted EAPOL frames even if encryption is
1186                          * configured
1187                          */
1188                         struct eapol *eap = (struct eapol *)(skb->data +
1189                                 24);
1190                         netdev_dbg(ieee->dev,
1191                                    "RX: IEEE 802.1X EAPOL frame: %s\n",
1192                                    eap_get_type(eap->type));
1193                 } else {
1194                         netdev_dbg(ieee->dev,
1195                                    "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1196                                    hdr->addr2);
1197                         return -1;
1198                 }
1199         }
1200
1201         if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1202             rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1203                 struct eapol *eap = (struct eapol *)(skb->data + 24);
1204                 netdev_dbg(ieee->dev, "RX: IEEE 802.1X EAPOL frame: %s\n",
1205                            eap_get_type(eap->type));
1206         }
1207
1208         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1209             !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1210                 netdev_dbg(ieee->dev,
1211                            "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1212                            hdr->addr2);
1213                 return -1;
1214         }
1215
1216         if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1217                 netdev_warn(ieee->dev, "RX: IEEE802.1X EAPOL frame!\n");
1218
1219         return 0;
1220 }
1221
1222 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast,
1223                                       u8 nr_subframes)
1224 {
1225         if (unicast) {
1226
1227                 if (ieee->state == RTLLIB_LINKED) {
1228                         if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1229                             ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1230                             (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1231                                 if (ieee->LeisurePSLeave)
1232                                         ieee->LeisurePSLeave(ieee->dev);
1233                         }
1234                 }
1235         }
1236         ieee->last_rx_ps_time = jiffies;
1237 }
1238
1239 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1240                 struct rtllib_rx_stats *rx_stats,
1241                 struct rtllib_rxb *rxb,
1242                 u8 *dst,
1243                 u8 *src)
1244 {
1245         struct net_device *dev = ieee->dev;
1246         u16 ethertype;
1247         int i = 0;
1248
1249         if (rxb == NULL) {
1250                 netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
1251                 return;
1252         }
1253
1254         for (i = 0; i < rxb->nr_subframes; i++) {
1255                 struct sk_buff *sub_skb = rxb->subframes[i];
1256
1257                 if (sub_skb) {
1258                         /* convert hdr + possible LLC headers
1259                          * into Ethernet header
1260                          */
1261                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1262                         if (sub_skb->len >= 8 &&
1263                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1264                                 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1265                                 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1266                                 /* remove RFC1042 or Bridge-Tunnel encapsulation
1267                                  * and replace EtherType
1268                                  */
1269                                 skb_pull(sub_skb, SNAP_SIZE);
1270                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1271                                                 src);
1272                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1273                                                 dst);
1274                         } else {
1275                                 u16 len;
1276                                 /* Leave Ethernet header part of hdr
1277                                  * and full payload
1278                                  */
1279                                 len = sub_skb->len;
1280                                 memcpy(skb_push(sub_skb, 2), &len, 2);
1281                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1282                                                 src);
1283                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1284                                                 dst);
1285                         }
1286
1287                         ieee->stats.rx_packets++;
1288                         ieee->stats.rx_bytes += sub_skb->len;
1289
1290                         if (is_multicast_ether_addr(dst))
1291                                 ieee->stats.multicast++;
1292
1293                         /* Indicate the packets to upper layer */
1294                         memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1295                         sub_skb->protocol = eth_type_trans(sub_skb, dev);
1296                         sub_skb->dev = dev;
1297                         sub_skb->dev->stats.rx_packets++;
1298                         sub_skb->dev->stats.rx_bytes += sub_skb->len;
1299                         /* 802.11 crc not sufficient */
1300                         sub_skb->ip_summed = CHECKSUM_NONE;
1301                         netif_rx(sub_skb);
1302                 }
1303         }
1304         kfree(rxb);
1305 }
1306
1307 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1308                  struct rtllib_rx_stats *rx_stats)
1309 {
1310         struct net_device *dev = ieee->dev;
1311         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1312         struct lib80211_crypt_data *crypt = NULL;
1313         struct rtllib_rxb *rxb = NULL;
1314         struct rx_ts_record *pTS = NULL;
1315         u16 fc, sc, SeqNum = 0;
1316         u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1317         u8 *payload;
1318         u8 dst[ETH_ALEN];
1319         u8 src[ETH_ALEN];
1320         u8 bssid[ETH_ALEN] = {0};
1321
1322         size_t hdrlen = 0;
1323         bool bToOtherSTA = false;
1324         int ret = 0, i = 0;
1325
1326         hdr = (struct rtllib_hdr_4addr *)skb->data;
1327         fc = le16_to_cpu(hdr->frame_ctl);
1328         type = WLAN_FC_GET_TYPE(fc);
1329         stype = WLAN_FC_GET_STYPE(fc);
1330         sc = le16_to_cpu(hdr->seq_ctl);
1331
1332         /*Filter pkt not to me*/
1333         multicast = is_multicast_ether_addr(hdr->addr1);
1334         unicast = !multicast;
1335         if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1336                 if (ieee->bNetPromiscuousMode)
1337                         bToOtherSTA = true;
1338                 else
1339                         goto rx_dropped;
1340         }
1341
1342         /*Filter pkt has too small length */
1343         hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1344         if (skb->len < hdrlen) {
1345                 netdev_info(dev,
1346                             "%s():ERR!!! skb->len is smaller than hdrlen\n",
1347                             __func__);
1348                 goto rx_dropped;
1349         }
1350
1351         /* Filter Duplicate pkt */
1352         ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1353         if (ret < 0)
1354                 goto rx_dropped;
1355
1356         /* Filter CTRL Frame */
1357         if (type == RTLLIB_FTYPE_CTL)
1358                 goto rx_dropped;
1359
1360         /* Filter MGNT Frame */
1361         if (type == RTLLIB_FTYPE_MGMT) {
1362                 if (bToOtherSTA)
1363                         goto rx_dropped;
1364                 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1365                         goto rx_dropped;
1366                 else
1367                         goto rx_exit;
1368         }
1369
1370         /* Filter WAPI DATA Frame */
1371
1372         /* Update statstics for AP roaming */
1373         if (!bToOtherSTA) {
1374                 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1375                 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1376         }
1377         dev->last_rx = jiffies;
1378
1379         /* Data frame - extract src/dst addresses */
1380         rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1381
1382         /* Filter Data frames */
1383         ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1384         if (ret < 0)
1385                 goto rx_dropped;
1386
1387         if (skb->len == hdrlen)
1388                 goto rx_dropped;
1389
1390         /* Send pspoll based on moredata */
1391         if ((ieee->iw_mode == IW_MODE_INFRA)  &&
1392             (ieee->sta_sleep == LPS_IS_SLEEP) &&
1393             (ieee->polling) && (!bToOtherSTA)) {
1394                 if (WLAN_FC_MORE_DATA(fc)) {
1395                         /* more data bit is set, let's request a new frame
1396                          * from the AP
1397                          */
1398                         rtllib_sta_ps_send_pspoll_frame(ieee);
1399                 } else {
1400                         ieee->polling =  false;
1401                 }
1402         }
1403
1404         /* Get crypt if encrypted */
1405         ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1406         if (ret == -1)
1407                 goto rx_dropped;
1408
1409         /* Decrypt data frame (including reassemble) */
1410         ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1411         if (ret == -1)
1412                 goto rx_dropped;
1413         else if (ret == -2)
1414                 goto rx_exit;
1415
1416         /* Get TS for Rx Reorder  */
1417         hdr = (struct rtllib_hdr_4addr *) skb->data;
1418         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1419                 && !is_multicast_ether_addr(hdr->addr1)
1420                 && (!bToOtherSTA)) {
1421                 TID = Frame_QoSTID(skb->data);
1422                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1423                 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID,
1424                       RX_DIR, true);
1425                 if (TID != 0 && TID != 3)
1426                         ieee->bis_any_nonbepkts = true;
1427         }
1428
1429         /* Parse rx data frame (For AMSDU) */
1430         /* skb: hdr + (possible reassembled) full plaintext payload */
1431         payload = skb->data + hdrlen;
1432         rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1433         if (rxb == NULL)
1434                 goto rx_dropped;
1435
1436         /* to parse amsdu packets */
1437         /* qos data packets & reserved bit is 1 */
1438         if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1439                 /* only to free rxb, and not submit the packets
1440                  * to upper layer
1441                  */
1442                 for (i = 0; i < rxb->nr_subframes; i++)
1443                         dev_kfree_skb(rxb->subframes[i]);
1444                 kfree(rxb);
1445                 rxb = NULL;
1446                 goto rx_dropped;
1447         }
1448
1449         /* Update WAPI PN */
1450
1451         /* Check if leave LPS */
1452         if (!bToOtherSTA) {
1453                 if (ieee->bIsAggregateFrame)
1454                         nr_subframes = rxb->nr_subframes;
1455                 else
1456                         nr_subframes = 1;
1457                 if (unicast)
1458                         ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1459                 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1460         }
1461
1462         /* Indicate packets to upper layer or Rx Reorder */
1463         if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL ||
1464             bToOtherSTA)
1465                 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1466         else
1467                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1468
1469         dev_kfree_skb(skb);
1470
1471  rx_exit:
1472         return 1;
1473
1474  rx_dropped:
1475         ieee->stats.rx_dropped++;
1476
1477         /* Returning 0 indicates to caller that we have not handled the SKB--
1478          * so it is still allocated and can be used again by underlying
1479          * hardware as a DMA target
1480          */
1481         return 0;
1482 }
1483
1484 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1485                  struct rtllib_rx_stats *rx_stats)
1486 {
1487         return 0;
1488 }
1489
1490 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1491                  struct rtllib_rx_stats *rx_stats)
1492 {
1493         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1494         u16 fc = le16_to_cpu(hdr->frame_ctl);
1495         size_t hdrlen = rtllib_get_hdrlen(fc);
1496
1497         if (skb->len < hdrlen) {
1498                 netdev_info(ieee->dev,
1499                             "%s():ERR!!! skb->len is smaller than hdrlen\n",
1500                             __func__);
1501                 return 0;
1502         }
1503
1504         if (HTCCheck(ieee, skb->data)) {
1505                 if (net_ratelimit())
1506                         netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1507                                     __func__);
1508                 hdrlen += 4;
1509         }
1510
1511         rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1512         ieee->stats.rx_packets++;
1513         ieee->stats.rx_bytes += skb->len;
1514
1515         return 1;
1516 }
1517
1518 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1519                  struct rtllib_rx_stats *rx_stats)
1520 {
1521         return 0;
1522 }
1523
1524 /* All received frames are sent to this function. @skb contains the frame in
1525  * IEEE 802.11 format, i.e., in the format it was sent over air.
1526  * This function is called only as a tasklet (software IRQ).
1527  */
1528 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1529                  struct rtllib_rx_stats *rx_stats)
1530 {
1531         int ret = 0;
1532
1533         if (!ieee || !skb || !rx_stats) {
1534                 pr_info("%s: Input parameters NULL!\n", __func__);
1535                 goto rx_dropped;
1536         }
1537         if (skb->len < 10) {
1538                 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1539                 goto rx_dropped;
1540         }
1541
1542         switch (ieee->iw_mode) {
1543         case IW_MODE_ADHOC:
1544         case IW_MODE_INFRA:
1545                 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1546                 break;
1547         case IW_MODE_MASTER:
1548         case IW_MODE_REPEAT:
1549                 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1550                 break;
1551         case IW_MODE_MONITOR:
1552                 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1553                 break;
1554         case IW_MODE_MESH:
1555                 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1556                 break;
1557         default:
1558                 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1559                 break;
1560         }
1561
1562         return ret;
1563
1564  rx_dropped:
1565         if (ieee)
1566                 ieee->stats.rx_dropped++;
1567         return 0;
1568 }
1569 EXPORT_SYMBOL(rtllib_rx);
1570
1571 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1572
1573 /* Make ther structure we read from the beacon packet has the right values */
1574 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1575                                      *info_element, int sub_type)
1576 {
1577
1578         if (info_element->qui_subtype != sub_type)
1579                 return -1;
1580         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1581                 return -1;
1582         if (info_element->qui_type != QOS_OUI_TYPE)
1583                 return -1;
1584         if (info_element->version != QOS_VERSION_1)
1585                 return -1;
1586
1587         return 0;
1588 }
1589
1590
1591 /* Parse a QoS parameter element */
1592 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1593                                                         *element_param,
1594                                          struct rtllib_info_element
1595                                                         *info_element)
1596 {
1597         int ret = 0;
1598         u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1599
1600         if ((info_element == NULL) || (element_param == NULL))
1601                 return -1;
1602
1603         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1604                 memcpy(element_param->info_element.qui, info_element->data,
1605                        info_element->len);
1606                 element_param->info_element.elementID = info_element->id;
1607                 element_param->info_element.length = info_element->len;
1608         } else
1609                 ret = -1;
1610         if (ret == 0)
1611                 ret = rtllib_verify_qos_info(&element_param->info_element,
1612                                                 QOS_OUI_PARAM_SUB_TYPE);
1613         return ret;
1614 }
1615
1616 /* Parse a QoS information element */
1617 static int rtllib_read_qos_info_element(struct rtllib_qos_information_element
1618                                                         *element_info,
1619                                         struct rtllib_info_element
1620                                                         *info_element)
1621 {
1622         int ret = 0;
1623         u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1624
1625         if (element_info == NULL)
1626                 return -1;
1627         if (info_element == NULL)
1628                 return -1;
1629
1630         if ((info_element->id == QOS_ELEMENT_ID) &&
1631             (info_element->len == size)) {
1632                 memcpy(element_info->qui, info_element->data,
1633                        info_element->len);
1634                 element_info->elementID = info_element->id;
1635                 element_info->length = info_element->len;
1636         } else
1637                 ret = -1;
1638
1639         if (ret == 0)
1640                 ret = rtllib_verify_qos_info(element_info,
1641                                              QOS_OUI_INFO_SUB_TYPE);
1642         return ret;
1643 }
1644
1645
1646 /* Write QoS parameters from the ac parameters. */
1647 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1648                                                struct rtllib_qos_data *qos_data)
1649 {
1650         struct rtllib_qos_ac_parameter *ac_params;
1651         struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1652         int i;
1653         u8 aci;
1654         u8 acm;
1655
1656         qos_data->wmm_acm = 0;
1657         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1658                 ac_params = &(param_elm->ac_params_record[i]);
1659
1660                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1661                 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1662
1663                 if (aci >= QOS_QUEUE_NUM)
1664                         continue;
1665                 switch (aci) {
1666                 case 1:
1667                         /* BIT(0) | BIT(3) */
1668                         if (acm)
1669                                 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1670                         break;
1671                 case 2:
1672                         /* BIT(4) | BIT(5) */
1673                         if (acm)
1674                                 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1675                         break;
1676                 case 3:
1677                         /* BIT(6) | BIT(7) */
1678                         if (acm)
1679                                 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1680                         break;
1681                 case 0:
1682                 default:
1683                         /* BIT(1) | BIT(2) */
1684                         if (acm)
1685                                 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1686                         break;
1687                 }
1688
1689                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1690
1691                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1692                 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2);
1693
1694                 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max &
1695                                                      0x0F);
1696
1697                 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max &
1698                                                       0xF0) >> 4);
1699
1700                 qos_param->flag[aci] =
1701                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1702                 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1703         }
1704         return 0;
1705 }
1706
1707 /* we have a generic data element which it may contain QoS information or
1708  * parameters element. check the information element length to decide
1709  * which type to read
1710  */
1711 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee,
1712                                           struct rtllib_info_element
1713                                              *info_element,
1714                                           struct rtllib_network *network)
1715 {
1716         int rc = 0;
1717         struct rtllib_qos_information_element qos_info_element;
1718
1719         rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1720
1721         if (rc == 0) {
1722                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1723                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1724         } else {
1725                 struct rtllib_qos_parameter_info param_element;
1726
1727                 rc = rtllib_read_qos_param_element(&param_element,
1728                                                       info_element);
1729                 if (rc == 0) {
1730                         rtllib_qos_convert_ac_to_parameters(&param_element,
1731                                                                &(network->qos_data));
1732                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1733                         network->qos_data.param_count =
1734                             param_element.info_element.ac_info & 0x0F;
1735                 }
1736         }
1737
1738         if (rc == 0) {
1739                 netdev_dbg(ieee->dev, "QoS is supported\n");
1740                 network->qos_data.supported = 1;
1741         }
1742         return rc;
1743 }
1744
1745 static const char *get_info_element_string(u16 id)
1746 {
1747         switch (id) {
1748         case MFIE_TYPE_SSID:
1749                 return "SSID";
1750         case MFIE_TYPE_RATES:
1751                 return "RATES";
1752         case MFIE_TYPE_FH_SET:
1753                 return "FH_SET";
1754         case MFIE_TYPE_DS_SET:
1755                 return "DS_SET";
1756         case MFIE_TYPE_CF_SET:
1757                 return "CF_SET";
1758         case MFIE_TYPE_TIM:
1759                 return "TIM";
1760         case MFIE_TYPE_IBSS_SET:
1761                 return "IBSS_SET";
1762         case MFIE_TYPE_COUNTRY:
1763                 return "COUNTRY";
1764         case MFIE_TYPE_HOP_PARAMS:
1765                 return "HOP_PARAMS";
1766         case MFIE_TYPE_HOP_TABLE:
1767                 return "HOP_TABLE";
1768         case MFIE_TYPE_REQUEST:
1769                 return "REQUEST";
1770         case MFIE_TYPE_CHALLENGE:
1771                 return "CHALLENGE";
1772         case MFIE_TYPE_POWER_CONSTRAINT:
1773                 return "POWER_CONSTRAINT";
1774         case MFIE_TYPE_POWER_CAPABILITY:
1775                 return "POWER_CAPABILITY";
1776         case MFIE_TYPE_TPC_REQUEST:
1777                 return "TPC_REQUEST";
1778         case MFIE_TYPE_TPC_REPORT:
1779                 return "TPC_REPORT";
1780         case MFIE_TYPE_SUPP_CHANNELS:
1781                 return "SUPP_CHANNELS";
1782         case MFIE_TYPE_CSA:
1783                 return "CSA";
1784         case MFIE_TYPE_MEASURE_REQUEST:
1785                 return "MEASURE_REQUEST";
1786         case MFIE_TYPE_MEASURE_REPORT:
1787                 return "MEASURE_REPORT";
1788         case MFIE_TYPE_QUIET:
1789                 return "QUIET";
1790         case MFIE_TYPE_IBSS_DFS:
1791                 return "IBSS_DFS";
1792         case MFIE_TYPE_RSN:
1793                 return "RSN";
1794         case MFIE_TYPE_RATES_EX:
1795                 return "RATES_EX";
1796         case MFIE_TYPE_GENERIC:
1797                 return "GENERIC";
1798         case MFIE_TYPE_QOS_PARAMETER:
1799                 return "QOS_PARAMETER";
1800         default:
1801                 return "UNKNOWN";
1802         }
1803 }
1804
1805 static inline void rtllib_extract_country_ie(
1806         struct rtllib_device *ieee,
1807         struct rtllib_info_element *info_element,
1808         struct rtllib_network *network,
1809         u8 *addr2)
1810 {
1811         if (IS_DOT11D_ENABLE(ieee)) {
1812                 if (info_element->len != 0) {
1813                         memcpy(network->CountryIeBuf, info_element->data,
1814                                info_element->len);
1815                         network->CountryIeLen = info_element->len;
1816
1817                         if (!IS_COUNTRY_IE_VALID(ieee)) {
1818                                 if (rtllib_act_scanning(ieee, false) &&
1819                                     ieee->FirstIe_InScan)
1820                                         netdev_info(ieee->dev,
1821                                                     "Received beacon ContryIE, SSID: <%s>\n",
1822                                                     network->ssid);
1823                                 Dot11d_UpdateCountryIe(ieee, addr2,
1824                                                        info_element->len,
1825                                                        info_element->data);
1826                         }
1827                 }
1828
1829                 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1830                         UPDATE_CIE_WATCHDOG(ieee);
1831         }
1832
1833 }
1834
1835 static void rtllib_parse_mife_generic(struct rtllib_device *ieee,
1836                                       struct rtllib_info_element *info_element,
1837                                       struct rtllib_network *network,
1838                                       u16 *tmp_htcap_len,
1839                                       u16 *tmp_htinfo_len)
1840 {
1841         u16 ht_realtek_agg_len = 0;
1842         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1843
1844         if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network))
1845                 return;
1846         if (info_element->len >= 4 &&
1847             info_element->data[0] == 0x00 &&
1848             info_element->data[1] == 0x50 &&
1849             info_element->data[2] == 0xf2 &&
1850             info_element->data[3] == 0x01) {
1851                 network->wpa_ie_len = min(info_element->len + 2,
1852                                           MAX_WPA_IE_LEN);
1853                 memcpy(network->wpa_ie, info_element, network->wpa_ie_len);
1854                 return;
1855         }
1856         if (info_element->len == 7 &&
1857             info_element->data[0] == 0x00 &&
1858             info_element->data[1] == 0xe0 &&
1859             info_element->data[2] == 0x4c &&
1860             info_element->data[3] == 0x01 &&
1861             info_element->data[4] == 0x02)
1862                 network->Turbo_Enable = 1;
1863
1864         if (*tmp_htcap_len == 0) {
1865                 if (info_element->len >= 4 &&
1866                     info_element->data[0] == 0x00 &&
1867                     info_element->data[1] == 0x90 &&
1868                     info_element->data[2] == 0x4c &&
1869                     info_element->data[3] == 0x033) {
1870                         *tmp_htcap_len = min_t(u8, info_element->len,
1871                                                MAX_IE_LEN);
1872                         if (*tmp_htcap_len != 0) {
1873                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1874                                 network->bssht.bdHTCapLen = min_t(u16, *tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf));
1875                                 memcpy(network->bssht.bdHTCapBuf,
1876                                        info_element->data,
1877                                        network->bssht.bdHTCapLen);
1878                         }
1879                 }
1880                 if (*tmp_htcap_len != 0) {
1881                         network->bssht.bdSupportHT = true;
1882                         network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1883                 } else {
1884                         network->bssht.bdSupportHT = false;
1885                         network->bssht.bdHT1R = false;
1886                 }
1887         }
1888
1889
1890         if (*tmp_htinfo_len == 0) {
1891                 if (info_element->len >= 4 &&
1892                     info_element->data[0] == 0x00 &&
1893                     info_element->data[1] == 0x90 &&
1894                     info_element->data[2] == 0x4c &&
1895                     info_element->data[3] == 0x034) {
1896                         *tmp_htinfo_len = min_t(u8, info_element->len,
1897                                                 MAX_IE_LEN);
1898                         if (*tmp_htinfo_len != 0) {
1899                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1900                                 network->bssht.bdHTInfoLen = min_t(u16, *tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf));
1901                                 memcpy(network->bssht.bdHTInfoBuf,
1902                                        info_element->data,
1903                                        network->bssht.bdHTInfoLen);
1904                         }
1905
1906                 }
1907         }
1908
1909         if (network->bssht.bdSupportHT) {
1910                 if (info_element->len >= 4 &&
1911                     info_element->data[0] == 0x00 &&
1912                     info_element->data[1] == 0xe0 &&
1913                     info_element->data[2] == 0x4c &&
1914                     info_element->data[3] == 0x02) {
1915                         ht_realtek_agg_len = min_t(u8, info_element->len,
1916                                                    MAX_IE_LEN);
1917                         memcpy(ht_realtek_agg_buf, info_element->data,
1918                                info_element->len);
1919                 }
1920                 if (ht_realtek_agg_len >= 5) {
1921                         network->realtek_cap_exit = true;
1922                         network->bssht.bdRT2RTAggregation = true;
1923
1924                         if ((ht_realtek_agg_buf[4] == 1) &&
1925                             (ht_realtek_agg_buf[5] & 0x02))
1926                                 network->bssht.bdRT2RTLongSlotTime = true;
1927
1928                         if ((ht_realtek_agg_buf[4] == 1) &&
1929                             (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1930                                 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1931                 }
1932         }
1933         if (ht_realtek_agg_len >= 5) {
1934                 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1935                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1936         }
1937
1938         if ((info_element->len >= 3 &&
1939              info_element->data[0] == 0x00 &&
1940              info_element->data[1] == 0x05 &&
1941              info_element->data[2] == 0xb5) ||
1942              (info_element->len >= 3 &&
1943              info_element->data[0] == 0x00 &&
1944              info_element->data[1] == 0x0a &&
1945              info_element->data[2] == 0xf7) ||
1946              (info_element->len >= 3 &&
1947              info_element->data[0] == 0x00 &&
1948              info_element->data[1] == 0x10 &&
1949              info_element->data[2] == 0x18)) {
1950                 network->broadcom_cap_exist = true;
1951         }
1952         if (info_element->len >= 3 &&
1953             info_element->data[0] == 0x00 &&
1954             info_element->data[1] == 0x0c &&
1955             info_element->data[2] == 0x43)
1956                 network->ralink_cap_exist = true;
1957         if ((info_element->len >= 3 &&
1958              info_element->data[0] == 0x00 &&
1959              info_element->data[1] == 0x03 &&
1960              info_element->data[2] == 0x7f) ||
1961              (info_element->len >= 3 &&
1962              info_element->data[0] == 0x00 &&
1963              info_element->data[1] == 0x13 &&
1964              info_element->data[2] == 0x74))
1965                 network->atheros_cap_exist = true;
1966
1967         if ((info_element->len >= 3 &&
1968              info_element->data[0] == 0x00 &&
1969              info_element->data[1] == 0x50 &&
1970              info_element->data[2] == 0x43))
1971                 network->marvell_cap_exist = true;
1972         if (info_element->len >= 3 &&
1973             info_element->data[0] == 0x00 &&
1974             info_element->data[1] == 0x40 &&
1975             info_element->data[2] == 0x96)
1976                 network->cisco_cap_exist = true;
1977
1978
1979         if (info_element->len >= 3 &&
1980             info_element->data[0] == 0x00 &&
1981             info_element->data[1] == 0x0a &&
1982             info_element->data[2] == 0xf5)
1983                 network->airgo_cap_exist = true;
1984
1985         if (info_element->len > 4 &&
1986             info_element->data[0] == 0x00 &&
1987             info_element->data[1] == 0x40 &&
1988             info_element->data[2] == 0x96 &&
1989             info_element->data[3] == 0x01) {
1990                 if (info_element->len == 6) {
1991                         memcpy(network->CcxRmState, &info_element[4], 2);
1992                         if (network->CcxRmState[0] != 0)
1993                                 network->bCcxRmEnable = true;
1994                         else
1995                                 network->bCcxRmEnable = false;
1996                         network->MBssidMask = network->CcxRmState[1] & 0x07;
1997                         if (network->MBssidMask != 0) {
1998                                 network->bMBssidValid = true;
1999                                 network->MBssidMask = 0xff <<
2000                                                       (network->MBssidMask);
2001                                 ether_addr_copy(network->MBssid,
2002                                                 network->bssid);
2003                                 network->MBssid[5] &= network->MBssidMask;
2004                         } else {
2005                                 network->bMBssidValid = false;
2006                         }
2007                 } else {
2008                         network->bCcxRmEnable = false;
2009                 }
2010         }
2011         if (info_element->len > 4  &&
2012             info_element->data[0] == 0x00 &&
2013             info_element->data[1] == 0x40 &&
2014             info_element->data[2] == 0x96 &&
2015             info_element->data[3] == 0x03) {
2016                 if (info_element->len == 5) {
2017                         network->bWithCcxVerNum = true;
2018                         network->BssCcxVerNumber = info_element->data[4];
2019                 } else {
2020                         network->bWithCcxVerNum = false;
2021                         network->BssCcxVerNumber = 0;
2022                 }
2023         }
2024         if (info_element->len > 4  &&
2025             info_element->data[0] == 0x00 &&
2026             info_element->data[1] == 0x50 &&
2027             info_element->data[2] == 0xf2 &&
2028             info_element->data[3] == 0x04) {
2029                 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n",
2030                            info_element->len);
2031                 network->wzc_ie_len = min(info_element->len+2, MAX_WZC_IE_LEN);
2032                 memcpy(network->wzc_ie, info_element, network->wzc_ie_len);
2033         }
2034 }
2035
2036 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element,
2037                                      struct rtllib_network *network,
2038                                      u16 *tmp_htcap_len)
2039 {
2040         struct bss_ht *ht = &network->bssht;
2041
2042         *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
2043         if (*tmp_htcap_len != 0) {
2044                 ht->bdHTSpecVer = HT_SPEC_VER_EWC;
2045                 ht->bdHTCapLen = min_t(u16, *tmp_htcap_len,
2046                                        sizeof(ht->bdHTCapBuf));
2047                 memcpy(ht->bdHTCapBuf, info_element->data, ht->bdHTCapLen);
2048
2049                 ht->bdSupportHT = true;
2050                 ht->bdHT1R = ((((struct ht_capab_ele *)
2051                                 ht->bdHTCapBuf))->MCS[1]) == 0;
2052
2053                 ht->bdBandWidth = (enum ht_channel_width)
2054                                              (((struct ht_capab_ele *)
2055                                              (ht->bdHTCapBuf))->ChlWidth);
2056         } else {
2057                 ht->bdSupportHT = false;
2058                 ht->bdHT1R = false;
2059                 ht->bdBandWidth = HT_CHANNEL_WIDTH_20;
2060         }
2061 }
2062
2063 int rtllib_parse_info_param(struct rtllib_device *ieee,
2064                 struct rtllib_info_element *info_element,
2065                 u16 length,
2066                 struct rtllib_network *network,
2067                 struct rtllib_rx_stats *stats)
2068 {
2069         u8 i;
2070         short offset;
2071         u16     tmp_htcap_len = 0;
2072         u16     tmp_htinfo_len = 0;
2073         char rates_str[64];
2074         char *p;
2075
2076         while (length >= sizeof(*info_element)) {
2077                 if (sizeof(*info_element) + info_element->len > length) {
2078                         netdev_dbg(ieee->dev,
2079                                    "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
2080                                    info_element->len + sizeof(*info_element),
2081                                    length, info_element->id);
2082                         /* We stop processing but don't return an error here
2083                          * because some misbehaviour APs break this rule. ie.
2084                          * Orinoco AP1000.
2085                          */
2086                         break;
2087                 }
2088
2089                 switch (info_element->id) {
2090                 case MFIE_TYPE_SSID:
2091                         if (rtllib_is_empty_essid(info_element->data,
2092                                                      info_element->len)) {
2093                                 network->flags |= NETWORK_EMPTY_ESSID;
2094                                 break;
2095                         }
2096
2097                         network->ssid_len = min(info_element->len,
2098                                                 (u8) IW_ESSID_MAX_SIZE);
2099                         memcpy(network->ssid, info_element->data,
2100                                network->ssid_len);
2101                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
2102                                 memset(network->ssid + network->ssid_len, 0,
2103                                        IW_ESSID_MAX_SIZE - network->ssid_len);
2104
2105                         netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n",
2106                                    network->ssid, network->ssid_len);
2107                         break;
2108
2109                 case MFIE_TYPE_RATES:
2110                         p = rates_str;
2111                         network->rates_len = min(info_element->len,
2112                                                  MAX_RATES_LENGTH);
2113                         for (i = 0; i < network->rates_len; i++) {
2114                                 network->rates[i] = info_element->data[i];
2115                                 p += snprintf(p, sizeof(rates_str) -
2116                                               (p - rates_str), "%02X ",
2117                                               network->rates[i]);
2118                                 if (rtllib_is_ofdm_rate
2119                                     (info_element->data[i])) {
2120                                         network->flags |= NETWORK_HAS_OFDM;
2121                                         if (info_element->data[i] &
2122                                             RTLLIB_BASIC_RATE_MASK)
2123                                                 network->flags &=
2124                                                     ~NETWORK_HAS_CCK;
2125                                 }
2126
2127                                 if (rtllib_is_cck_rate
2128                                     (info_element->data[i])) {
2129                                         network->flags |= NETWORK_HAS_CCK;
2130                                 }
2131                         }
2132
2133                         netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n",
2134                                    rates_str, network->rates_len);
2135                         break;
2136
2137                 case MFIE_TYPE_RATES_EX:
2138                         p = rates_str;
2139                         network->rates_ex_len = min(info_element->len,
2140                                                     MAX_RATES_EX_LENGTH);
2141                         for (i = 0; i < network->rates_ex_len; i++) {
2142                                 network->rates_ex[i] = info_element->data[i];
2143                                 p += snprintf(p, sizeof(rates_str) -
2144                                               (p - rates_str), "%02X ",
2145                                               network->rates_ex[i]);
2146                                 if (rtllib_is_ofdm_rate
2147                                     (info_element->data[i])) {
2148                                         network->flags |= NETWORK_HAS_OFDM;
2149                                         if (info_element->data[i] &
2150                                             RTLLIB_BASIC_RATE_MASK)
2151                                                 network->flags &=
2152                                                     ~NETWORK_HAS_CCK;
2153                                 }
2154                         }
2155
2156                         netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n",
2157                                    rates_str, network->rates_ex_len);
2158                         break;
2159
2160                 case MFIE_TYPE_DS_SET:
2161                         netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n",
2162                                    info_element->data[0]);
2163                         network->channel = info_element->data[0];
2164                         break;
2165
2166                 case MFIE_TYPE_FH_SET:
2167                         netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n");
2168                         break;
2169
2170                 case MFIE_TYPE_CF_SET:
2171                         netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n");
2172                         break;
2173
2174                 case MFIE_TYPE_TIM:
2175                         if (info_element->len < 4)
2176                                 break;
2177
2178                         network->tim.tim_count = info_element->data[0];
2179                         network->tim.tim_period = info_element->data[1];
2180
2181                         network->dtim_period = info_element->data[1];
2182                         if (ieee->state != RTLLIB_LINKED)
2183                                 break;
2184                         network->last_dtim_sta_time = jiffies;
2185
2186                         network->dtim_data = RTLLIB_DTIM_VALID;
2187
2188
2189                         if (info_element->data[2] & 1)
2190                                 network->dtim_data |= RTLLIB_DTIM_MBCAST;
2191
2192                         offset = (info_element->data[2] >> 1)*2;
2193
2194
2195                         if (ieee->assoc_id < 8*offset ||
2196                             ieee->assoc_id > 8*(offset + info_element->len - 3))
2197                                 break;
2198
2199                         offset = (ieee->assoc_id / 8) - offset;
2200                         if (info_element->data[3 + offset] &
2201                            (1 << (ieee->assoc_id % 8)))
2202                                 network->dtim_data |= RTLLIB_DTIM_UCAST;
2203
2204                         network->listen_interval = network->dtim_period;
2205                         break;
2206
2207                 case MFIE_TYPE_ERP:
2208                         network->erp_value = info_element->data[0];
2209                         network->flags |= NETWORK_HAS_ERP_VALUE;
2210                         netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n",
2211                                    network->erp_value);
2212                         break;
2213                 case MFIE_TYPE_IBSS_SET:
2214                         network->atim_window = info_element->data[0];
2215                         netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n",
2216                                    network->atim_window);
2217                         break;
2218
2219                 case MFIE_TYPE_CHALLENGE:
2220                         netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n");
2221                         break;
2222
2223                 case MFIE_TYPE_GENERIC:
2224                         netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n",
2225                                    info_element->len);
2226
2227                         rtllib_parse_mife_generic(ieee, info_element, network,
2228                                                   &tmp_htcap_len,
2229                                                   &tmp_htinfo_len);
2230                         break;
2231
2232                 case MFIE_TYPE_RSN:
2233                         netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n",
2234                                    info_element->len);
2235                         network->rsn_ie_len = min(info_element->len + 2,
2236                                                   MAX_WPA_IE_LEN);
2237                         memcpy(network->rsn_ie, info_element,
2238                                network->rsn_ie_len);
2239                         break;
2240
2241                 case MFIE_TYPE_HT_CAP:
2242                         netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n",
2243                                    info_element->len);
2244
2245                         rtllib_parse_mfie_ht_cap(info_element, network,
2246                                                  &tmp_htcap_len);
2247                         break;
2248
2249
2250                 case MFIE_TYPE_HT_INFO:
2251                         netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n",
2252                                    info_element->len);
2253                         tmp_htinfo_len = min_t(u8, info_element->len,
2254                                                MAX_IE_LEN);
2255                         if (tmp_htinfo_len) {
2256                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2257                                 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2258                                         sizeof(network->bssht.bdHTInfoBuf) ?
2259                                         sizeof(network->bssht.bdHTInfoBuf) :
2260                                         tmp_htinfo_len;
2261                                 memcpy(network->bssht.bdHTInfoBuf,
2262                                        info_element->data,
2263                                        network->bssht.bdHTInfoLen);
2264                         }
2265                         break;
2266
2267                 case MFIE_TYPE_AIRONET:
2268                         netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n",
2269                                    info_element->len);
2270                         if (info_element->len > IE_CISCO_FLAG_POSITION) {
2271                                 network->bWithAironetIE = true;
2272
2273                                 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2274                                      & SUPPORT_CKIP_MIC) ||
2275                                      (info_element->data[IE_CISCO_FLAG_POSITION]
2276                                      & SUPPORT_CKIP_PK))
2277                                         network->bCkipSupported = true;
2278                                 else
2279                                         network->bCkipSupported = false;
2280                         } else {
2281                                 network->bWithAironetIE = false;
2282                                 network->bCkipSupported = false;
2283                         }
2284                         break;
2285                 case MFIE_TYPE_QOS_PARAMETER:
2286                         netdev_err(ieee->dev,
2287                                    "QoS Error need to parse QOS_PARAMETER IE\n");
2288                         break;
2289
2290                 case MFIE_TYPE_COUNTRY:
2291                         netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n",
2292                                    info_element->len);
2293                         rtllib_extract_country_ie(ieee, info_element, network,
2294                                                   network->bssid);
2295                         break;
2296 /* TODO */
2297                 default:
2298                         netdev_dbg(ieee->dev,
2299                                    "Unsupported info element: %s (%d)\n",
2300                                    get_info_element_string(info_element->id),
2301                                    info_element->id);
2302                         break;
2303                 }
2304
2305                 length -= sizeof(*info_element) + info_element->len;
2306                 info_element =
2307                     (struct rtllib_info_element *)&info_element->
2308                     data[info_element->len];
2309         }
2310
2311         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2312             !network->cisco_cap_exist && !network->ralink_cap_exist &&
2313             !network->bssht.bdRT2RTAggregation)
2314                 network->unknown_cap_exist = true;
2315         else
2316                 network->unknown_cap_exist = false;
2317         return 0;
2318 }
2319
2320 static long rtllib_translate_todbm(u8 signal_strength_index)
2321 {
2322         long    signal_power;
2323
2324         signal_power = (long)((signal_strength_index + 1) >> 1);
2325         signal_power -= 95;
2326
2327         return signal_power;
2328 }
2329
2330 static inline int rtllib_network_init(
2331         struct rtllib_device *ieee,
2332         struct rtllib_probe_response *beacon,
2333         struct rtllib_network *network,
2334         struct rtllib_rx_stats *stats)
2335 {
2336         memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2337
2338         /* Pull out fixed field data */
2339         ether_addr_copy(network->bssid, beacon->header.addr3);
2340         network->capability = le16_to_cpu(beacon->capability);
2341         network->last_scanned = jiffies;
2342         network->time_stamp[0] = beacon->time_stamp[0];
2343         network->time_stamp[1] = beacon->time_stamp[1];
2344         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2345         /* Where to pull this? beacon->listen_interval;*/
2346         network->listen_interval = 0x0A;
2347         network->rates_len = network->rates_ex_len = 0;
2348         network->ssid_len = 0;
2349         network->hidden_ssid_len = 0;
2350         memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2351         network->flags = 0;
2352         network->atim_window = 0;
2353         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2354             0x3 : 0x0;
2355         network->berp_info_valid = false;
2356         network->broadcom_cap_exist = false;
2357         network->ralink_cap_exist = false;
2358         network->atheros_cap_exist = false;
2359         network->cisco_cap_exist = false;
2360         network->unknown_cap_exist = false;
2361         network->realtek_cap_exit = false;
2362         network->marvell_cap_exist = false;
2363         network->airgo_cap_exist = false;
2364         network->Turbo_Enable = 0;
2365         network->SignalStrength = stats->SignalStrength;
2366         network->RSSI = stats->SignalStrength;
2367         network->CountryIeLen = 0;
2368         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2369         HTInitializeBssDesc(&network->bssht);
2370         if (stats->freq == RTLLIB_52GHZ_BAND) {
2371                 /* for A band (No DS info) */
2372                 network->channel = stats->received_channel;
2373         } else
2374                 network->flags |= NETWORK_HAS_CCK;
2375
2376         network->wpa_ie_len = 0;
2377         network->rsn_ie_len = 0;
2378         network->wzc_ie_len = 0;
2379
2380         if (rtllib_parse_info_param(ieee,
2381                         beacon->info_element,
2382                         (stats->len - sizeof(*beacon)),
2383                         network,
2384                         stats))
2385                 return 1;
2386
2387         network->mode = 0;
2388         if (stats->freq == RTLLIB_52GHZ_BAND)
2389                 network->mode = IEEE_A;
2390         else {
2391                 if (network->flags & NETWORK_HAS_OFDM)
2392                         network->mode |= IEEE_G;
2393                 if (network->flags & NETWORK_HAS_CCK)
2394                         network->mode |= IEEE_B;
2395         }
2396
2397         if (network->mode == 0) {
2398                 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n",
2399                            escape_essid(network->ssid, network->ssid_len),
2400                            network->bssid);
2401                 return 1;
2402         }
2403
2404         if (network->bssht.bdSupportHT) {
2405                 if (network->mode == IEEE_A)
2406                         network->mode = IEEE_N_5G;
2407                 else if (network->mode & (IEEE_G | IEEE_B))
2408                         network->mode = IEEE_N_24G;
2409         }
2410         if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2411                 network->flags |= NETWORK_EMPTY_ESSID;
2412         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2413         stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2414
2415         memcpy(&network->stats, stats, sizeof(network->stats));
2416
2417         return 0;
2418 }
2419
2420 static inline int is_same_network(struct rtllib_network *src,
2421                                   struct rtllib_network *dst, u8 ssidbroad)
2422 {
2423         /* A network is only a duplicate if the channel, BSSID, ESSID
2424          * and the capability field (in particular IBSS and BSS) all match.
2425          * We treat all <hidden> with the same BSSID and channel
2426          * as one network
2427          */
2428         return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2429                 (src->channel == dst->channel) &&
2430                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2431                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2432                 (!ssidbroad)) &&
2433                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2434                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2435                 ((src->capability & WLAN_CAPABILITY_ESS) ==
2436                 (dst->capability & WLAN_CAPABILITY_ESS)));
2437 }
2438
2439
2440 static inline void update_network(struct rtllib_device *ieee,
2441                                   struct rtllib_network *dst,
2442                                   struct rtllib_network *src)
2443 {
2444         int qos_active;
2445         u8 old_param;
2446
2447         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2448         dst->capability = src->capability;
2449         memcpy(dst->rates, src->rates, src->rates_len);
2450         dst->rates_len = src->rates_len;
2451         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2452         dst->rates_ex_len = src->rates_ex_len;
2453         if (src->ssid_len > 0) {
2454                 if (dst->ssid_len == 0) {
2455                         memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2456                         dst->hidden_ssid_len = src->ssid_len;
2457                         memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2458                 } else {
2459                         memset(dst->ssid, 0, dst->ssid_len);
2460                         dst->ssid_len = src->ssid_len;
2461                         memcpy(dst->ssid, src->ssid, src->ssid_len);
2462                 }
2463         }
2464         dst->mode = src->mode;
2465         dst->flags = src->flags;
2466         dst->time_stamp[0] = src->time_stamp[0];
2467         dst->time_stamp[1] = src->time_stamp[1];
2468         if (src->flags & NETWORK_HAS_ERP_VALUE) {
2469                 dst->erp_value = src->erp_value;
2470                 dst->berp_info_valid = src->berp_info_valid = true;
2471         }
2472         dst->beacon_interval = src->beacon_interval;
2473         dst->listen_interval = src->listen_interval;
2474         dst->atim_window = src->atim_window;
2475         dst->dtim_period = src->dtim_period;
2476         dst->dtim_data = src->dtim_data;
2477         dst->last_dtim_sta_time = src->last_dtim_sta_time;
2478         memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2479
2480         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2481         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2482         dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2483         memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2484                src->bssht.bdHTCapLen);
2485         dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2486         memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2487                src->bssht.bdHTInfoLen);
2488         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2489         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2490         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2491         dst->ralink_cap_exist = src->ralink_cap_exist;
2492         dst->atheros_cap_exist = src->atheros_cap_exist;
2493         dst->realtek_cap_exit = src->realtek_cap_exit;
2494         dst->marvell_cap_exist = src->marvell_cap_exist;
2495         dst->cisco_cap_exist = src->cisco_cap_exist;
2496         dst->airgo_cap_exist = src->airgo_cap_exist;
2497         dst->unknown_cap_exist = src->unknown_cap_exist;
2498         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2499         dst->wpa_ie_len = src->wpa_ie_len;
2500         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2501         dst->rsn_ie_len = src->rsn_ie_len;
2502         memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2503         dst->wzc_ie_len = src->wzc_ie_len;
2504
2505         dst->last_scanned = jiffies;
2506         /* qos related parameters */
2507         qos_active = dst->qos_data.active;
2508         old_param = dst->qos_data.param_count;
2509         dst->qos_data.supported = src->qos_data.supported;
2510         if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2511                 memcpy(&dst->qos_data, &src->qos_data,
2512                        sizeof(struct rtllib_qos_data));
2513         if (dst->qos_data.supported == 1) {
2514                 if (dst->ssid_len)
2515                         netdev_dbg(ieee->dev,
2516                                    "QoS the network %s is QoS supported\n",
2517                                    dst->ssid);
2518                 else
2519                         netdev_dbg(ieee->dev,
2520                                    "QoS the network is QoS supported\n");
2521         }
2522         dst->qos_data.active = qos_active;
2523         dst->qos_data.old_param_count = old_param;
2524
2525         dst->wmm_info = src->wmm_info;
2526         if (src->wmm_param[0].ac_aci_acm_aifsn ||
2527            src->wmm_param[1].ac_aci_acm_aifsn ||
2528            src->wmm_param[2].ac_aci_acm_aifsn ||
2529            src->wmm_param[3].ac_aci_acm_aifsn)
2530                 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2531
2532         dst->SignalStrength = src->SignalStrength;
2533         dst->RSSI = src->RSSI;
2534         dst->Turbo_Enable = src->Turbo_Enable;
2535
2536         dst->CountryIeLen = src->CountryIeLen;
2537         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2538
2539         dst->bWithAironetIE = src->bWithAironetIE;
2540         dst->bCkipSupported = src->bCkipSupported;
2541         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2542         dst->bCcxRmEnable = src->bCcxRmEnable;
2543         dst->MBssidMask = src->MBssidMask;
2544         dst->bMBssidValid = src->bMBssidValid;
2545         memcpy(dst->MBssid, src->MBssid, 6);
2546         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2547         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2548 }
2549
2550 static inline int is_beacon(u16 fc)
2551 {
2552         return (WLAN_FC_GET_STYPE(fc) == RTLLIB_STYPE_BEACON);
2553 }
2554
2555 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2556 {
2557         if (channel > MAX_CHANNEL_NUMBER) {
2558                 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2559                 return 0;
2560         }
2561
2562         if (rtllib->active_channel_map[channel] == 2)
2563                 return 1;
2564
2565         return 0;
2566 }
2567
2568 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2569 {
2570         if (channel > MAX_CHANNEL_NUMBER) {
2571                 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2572                 return 0;
2573         }
2574         if (rtllib->active_channel_map[channel] > 0)
2575                 return 1;
2576
2577         return 0;
2578 }
2579 EXPORT_SYMBOL(rtllib_legal_channel);
2580
2581 static inline void rtllib_process_probe_response(
2582         struct rtllib_device *ieee,
2583         struct rtllib_probe_response *beacon,
2584         struct rtllib_rx_stats *stats)
2585 {
2586         struct rtllib_network *target;
2587         struct rtllib_network *oldest = NULL;
2588         struct rtllib_info_element *info_element = &beacon->info_element[0];
2589         unsigned long flags;
2590         short renew;
2591         struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2592                                                  GFP_ATOMIC);
2593         u16 frame_ctl = le16_to_cpu(beacon->header.frame_ctl);
2594
2595         if (!network)
2596                 return;
2597
2598         netdev_dbg(ieee->dev,
2599                    "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2600                    escape_essid(info_element->data, info_element->len),
2601                    beacon->header.addr3,
2602                    (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2603                    (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2604                    (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2605                    (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2606                    (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2607                    (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2608                    (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2609                    (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2610                    (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2611                    (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2612                    (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2613                    (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2614                    (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2615                    (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2616                    (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2617                    (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2618
2619         if (rtllib_network_init(ieee, beacon, network, stats)) {
2620                 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n",
2621                            escape_essid(info_element->data, info_element->len),
2622                            beacon->header.addr3,
2623                            is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2624                 goto free_network;
2625         }
2626
2627
2628         if (!rtllib_legal_channel(ieee, network->channel))
2629                 goto free_network;
2630
2631         if (WLAN_FC_GET_STYPE(frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
2632                 if (IsPassiveChannel(ieee, network->channel)) {
2633                         netdev_info(ieee->dev,
2634                                     "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2635                                     network->channel);
2636                         goto free_network;
2637                 }
2638         }
2639
2640         /* The network parsed correctly -- so now we scan our known networks
2641          * to see if we can find it in our list.
2642          *
2643          * NOTE:  This search is definitely not optimized.  Once its doing
2644          *      the "right thing" we'll optimize it for efficiency if
2645          *      necessary
2646          */
2647
2648         /* Search for this entry in the list and update it if it is
2649          * already there.
2650          */
2651
2652         spin_lock_irqsave(&ieee->lock, flags);
2653         if (is_same_network(&ieee->current_network, network,
2654            (network->ssid_len ? 1 : 0))) {
2655                 update_network(ieee, &ieee->current_network, network);
2656                 if ((ieee->current_network.mode == IEEE_N_24G ||
2657                      ieee->current_network.mode == IEEE_G)
2658                      && ieee->current_network.berp_info_valid) {
2659                         if (ieee->current_network.erp_value & ERP_UseProtection)
2660                                 ieee->current_network.buseprotection = true;
2661                         else
2662                                 ieee->current_network.buseprotection = false;
2663                 }
2664                 if (is_beacon(frame_ctl)) {
2665                         if (ieee->state >= RTLLIB_LINKED)
2666                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2667                 }
2668         }
2669         list_for_each_entry(target, &ieee->network_list, list) {
2670                 if (is_same_network(target, network,
2671                    (target->ssid_len ? 1 : 0)))
2672                         break;
2673                 if ((oldest == NULL) ||
2674                     (target->last_scanned < oldest->last_scanned))
2675                         oldest = target;
2676         }
2677
2678         /* If we didn't find a match, then get a new network slot to initialize
2679          * with this beacon's information
2680          */
2681         if (&target->list == &ieee->network_list) {
2682                 if (list_empty(&ieee->network_free_list)) {
2683                         /* If there are no more slots, expire the oldest */
2684                         list_del(&oldest->list);
2685                         target = oldest;
2686                         netdev_dbg(ieee->dev,
2687                                    "Expired '%s' ( %pM) from network list.\n",
2688                                    escape_essid(target->ssid, target->ssid_len),
2689                                    target->bssid);
2690                 } else {
2691                         /* Otherwise just pull from the free list */
2692                         target = list_entry(ieee->network_free_list.next,
2693                                             struct rtllib_network, list);
2694                         list_del(ieee->network_free_list.next);
2695                 }
2696
2697                 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n",
2698                            escape_essid(network->ssid, network->ssid_len),
2699                            network->bssid,
2700                            is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2701
2702                 memcpy(target, network, sizeof(*target));
2703                 list_add_tail(&target->list, &ieee->network_list);
2704                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2705                         rtllib_softmac_new_net(ieee, network);
2706         } else {
2707                 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n",
2708                            escape_essid(target->ssid, target->ssid_len),
2709                            target->bssid,
2710                            is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2711
2712                 /* we have an entry and we are going to update it. But this
2713                  *  entry may be already expired. In this case we do the same
2714                  * as we found a new net and call the new_net handler
2715                  */
2716                 renew = !time_after(target->last_scanned + ieee->scan_age,
2717                                     jiffies);
2718                 if ((!target->ssid_len) &&
2719                     (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2720                     || ((ieee->current_network.ssid_len == network->ssid_len) &&
2721                     (strncmp(ieee->current_network.ssid, network->ssid,
2722                     network->ssid_len) == 0) &&
2723                     (ieee->state == RTLLIB_NOLINK))))
2724                         renew = 1;
2725                 update_network(ieee, target, network);
2726                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2727                         rtllib_softmac_new_net(ieee, network);
2728         }
2729
2730         spin_unlock_irqrestore(&ieee->lock, flags);
2731         if (is_beacon(frame_ctl) &&
2732             is_same_network(&ieee->current_network, network,
2733             (network->ssid_len ? 1 : 0)) &&
2734             (ieee->state == RTLLIB_LINKED)) {
2735                 if (ieee->handle_beacon != NULL)
2736                         ieee->handle_beacon(ieee->dev, beacon,
2737                                             &ieee->current_network);
2738         }
2739 free_network:
2740         kfree(network);
2741 }
2742
2743 static void rtllib_rx_mgt(struct rtllib_device *ieee,
2744                           struct sk_buff *skb,
2745                           struct rtllib_rx_stats *stats)
2746 {
2747         struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2748
2749         if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2750             RTLLIB_STYPE_PROBE_RESP) &&
2751             (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2752             RTLLIB_STYPE_BEACON))
2753                 ieee->last_rx_ps_time = jiffies;
2754
2755         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2756
2757         case RTLLIB_STYPE_BEACON:
2758                 netdev_dbg(ieee->dev, "received BEACON (%d)\n",
2759                            WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2760                 rtllib_process_probe_response(
2761                                 ieee, (struct rtllib_probe_response *)header,
2762                                 stats);
2763
2764                 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2765                     ieee->iw_mode == IW_MODE_INFRA &&
2766                     ieee->state == RTLLIB_LINKED))
2767                         tasklet_schedule(&ieee->ps_task);
2768
2769                 break;
2770
2771         case RTLLIB_STYPE_PROBE_RESP:
2772                 netdev_dbg(ieee->dev, "received PROBE RESPONSE (%d)\n",
2773                            WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2774                 rtllib_process_probe_response(ieee,
2775                               (struct rtllib_probe_response *)header, stats);
2776                 break;
2777         case RTLLIB_STYPE_PROBE_REQ:
2778                 netdev_dbg(ieee->dev, "received PROBE RESQUEST (%d)\n",
2779                            WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2780                 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2781                     ((ieee->iw_mode == IW_MODE_ADHOC ||
2782                     ieee->iw_mode == IW_MODE_MASTER) &&
2783                     ieee->state == RTLLIB_LINKED))
2784                         rtllib_rx_probe_rq(ieee, skb);
2785                 break;
2786         }
2787 }